Variable valve lift (VVL) is an automotive piston engine technology which varies the height a valve opens in order to improve performance, fuel economy or emissions.

Mar 27, 2025 · VVT advances or retards cam/valve timing, while VVL changes valve duration and lift. Those three capabilities of VVT/VVL can help engines raise miles per gallon (MPG), increase …

Variable Valve Lift (VVL) engines can change how high the intake and exhaust valves open. This technology improves performance by adjusting valve lift for different driving situations.

NISSAN's newly developed Variable Valve Event and Lift (VVEL) system for realizing unprecedented balance of responsiveness and power, fuel efficiency and low emissions.

Jan 4, 2025 · VVL technology allows the engine control unit (ECU) to adjust the valve lift based on the engine's operating conditions. The ECU sends commands to solenoids, which regulate oil pressure …

Jun 11, 2025 · Variable Valve Lift (VVL) is an advanced engine technology designed to optimize the performance, efficiency, and emissions of internal combustion engines. At its core, VVL allows for …

Jan 19, 2017 · Variable valve lift (VVL) and variable valve timing (VVT) are two of the most common dynamic valvetrain features found in modern commuter cars and even many of today’s performance …

A number of systems are designed to provide a means to change valve behavior based on engine operation and include variable valve timing, continuously variable valve timing, variable valve lift …

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Abstract: Variable valve actuation (VVA) technologies are used to add flexibility to the engine’s valve train by enabling variable valve event timing, duration and/or lift. The main types of VVA technologies …